11
4. OPERATION - Front panel
Ta pe
Gain -6 dB
Stand By
CD sym
CD
Aux
Tuner
Phono
Power
010
Source
Operate
Bypass
Aux
Mute
HP 300 MK 2
Main power push button switch
The LED above the mode rotary switch
is burning when the unit is switched on.
Depending on the position of the mode rotary switch
one or none of the LEDs beneath
the mode switch is burning (The amplifier is starting in the normal position when the LED
–6dB is burning or both LEDs are out. If the stand by LED is burning the amplifier is in
"Stand By" and cannot start )
The amplifier needs approx 3 minutes to operate because of the Soft Start electronics.
The end of this phase is indicated by the LEDs beneath the input selector
or the LED
above the tape switch
Mode rotary switch
Here you can switch, the Stand By function as well as the gain factor of the line stage.
Position Stand By: The LED next to Stand By burns. If Stand By is selected, the output
will be short-circuited (muting). The semiconductors remain current
carrying; the tubes operate with reduced power and heating. This
position is recommended in case of longer intermissions (up to 10
hours, if you do not want to turn off the unit) and to burn-in new
tubes. After ending the Stand-By function, it takes 3 minutes until
the output will be cleared.
Position Gain normal: (central position) none of the two LED s burns. At this position the
ain factor of the line stage is +7. This position is recommended for
amplifier-/ loudspeaker combinations with low efficiency.
Position Gain -6 dB: The -6 dB-LED burns. At this position the gain factor of the line
stage is +3. This position is recommended for amplifier-/
oudspeaker combinations with a normal efficiency.
Tape-Monitor-switch
Because of the monitor function, playback Tape can only be turned on here. It does not
influence the simultaneous recording of a source selected at the input-selector.
Switch down: The LED above the tape switch burns. Tape or tape record signal is
monitored.
Switch up: One of the LED s beneath the input-selector burns. The source is
monitored which is indicated at the input selector
Volume Control
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